On 10/4/2017 2:27 AM, Peter Zijlstra wrote:
On Mon, Oct 02, 2017 at 10:12:18AM -0500, mike.tra...@hpe.com wrote:
static void detect_art(void)
{
unsigned int unused[2];
- if (boot_cpu_data.cpuid_level < ART_CPUID_LEAF)
+ if (boot_cpu_data.cpuid_level < ART_CPUID_LEAF || tsc_art_disabled)
return;
/* Don't enable ART in a VM, non-stop TSC and TSC_ADJUST required */
So why can't we use is_uv_system() here an for the tsc_adjust thing?
I could. I just thought that there may be future system arches that
need the same facility?
Also (and I hate the name) tsc_multi_sync_resets is the reason you
cannot use ART, I don't think it makes sense to introduce yet another
knob.
Okay. I wasn't sure if there might be different causes for wanting one
condition over the other. So does this mean change this later test to
use is_uv_system() or tsc_multi_sync_resets?
Thanks.
